Electron-discharge device



Feb. 9 1926. 1,572,726

- M. J. KELLY ELECTRON DISCHARGE DEVICE Filed August 3l, 1922 '3/5 /7 y 1. I 1 n; f

s zl ff /7 n 22 /J a s l /9 /0 )nl 2J 22 /6 V f4 V LLL i i f (h l l Il! Illil lll /m/w/o/' Ne/V/hL//fe//j Patented Feb. 9, 1926.

UNITED STATES PATENT OFFICE.

MERVIN J. KELLY, OF NEW YORK, N. Y., ASSIGNOR TO WESTERN ELECTRIC COMIPANY,

INCORPORATED, OF NEW YORK, N.

Y., A CORPORATION OF NEW YORK.

ELECTRON-IDISCHARGE DEVICE.

Application filed August 31, 1922.

To all whom t may concern.'

Be it known that I, MERVIN J. KELLY, a citizen of the United States, residing at New York, in the countyv of New York, State ofy New York, have invented certain new and use-ful Improvements in Electron- Discharge Devices, of which the following is a full, clear, concise, and exact description.

An object of this invention is to limit the' vibration of the filament under the influence of the e electric field.

Referring to the drawing:

Fig. 1 is a side elevation of an electron discharge device embodying the invention;

Fig. 2 is a view of the electrode assembly in transverse section.

The device comprises an enclosing vessel 10 having a reentrant stem 11, upon which is arranged a metallic collar 12 and anode 13 of the flattened cylinder type supported" from the collar 12 by means of the supports 14. vA block 15 of insulating material, preferably lavite, is supported from the upper end of the anode. and a similar block 16 is supportedfrom the lower end. In the uioper block 15 are provided hooks 17, and in the lower block 16 are provided similar hooks 18. A filament 19 is strung back and serial No. 585,3'70.

forth between these hooks and is arranged in the medial plane of the anode.

Carried by the lower block 16 and extending to approximately the midpoint of the anode, are rods 2O and 21 which are arranged on opposite sides of the filament 19. These rods are formed of resilient material capable of withstanding the high temperature to which it is subjected, without losing its resiliency, such, for example, as molybdenum. Carried by the upper ends of the rods 2O is an insulating member 22, preferably quartz, which extends across one side of the filament; a similar member 23 is carried bv the rods 21. These two members clamp between them the strands of the fila-- ment 19 and effectively prevent substantial vibration of the strands.

` The invention claimed is:

1'. In an electron discharge device, an anode, a cathode, a pair of insulating members gripping said cathode intermediate its ends to prevent vibration thereof.

2. In an electron discharge device, a cathode, an anode comprising a pair of arallel surfaces, a pair of insulating memb supported from one end of said anode, and gripping said cathode intermediate its ends to prevent vibration thereof.

3. In en electron discharge device, an anode having parallel surfaces, a block of insulating material supported by said anode, a cathode interposed between said surfaces, and a pair of insulating members supported from said block and gripping the filament intermediate its ends, to prevent the vibration thereof.

In witness whereof, I hereunto subscribe my name this 25th day of August A. D., 

